34.1.2.2. Center-pivoted arm
![../_images/image00929.png](../_images/image00929.png)
Figure 34.8 Center-pivoted arm Valve Train System
Components of Center-pivoted arm Valve Train system
Figure 34.9 Components of Center-pivoted arm Valve Train system
Components of a Rocker Arm
Figure 34.10 Components of a Rocker Arm
Coordinate System of Center-pivoted Valve Train system. ( Except cam shaft & valve system )
SPM is a special coordinate system to define the structure of Valve Train system.
Figure 34.11 Special Parametric Marker Structure
Figure 34.12 SPM position of a Rocker Arm 1
Figure 34.13 SPM position of a Rocker Arm 2